I’ve got it down to a science so I can procrastinate until the night before:
How many days? That many pairs of socks, underwear, and shirts, half that many pairs of pants. 2 additional pairs of socks and an extra shirt
Deodorant
Check to make sure the dedicated travel phone charger is still packed
Notebook
Laptop and charger dedicated to travel
A book that’s easy to pickup and set down
Corded headphones
Dedicated laundry bag for trips longer than 10 days
Bring a toothbrush for trips longer than 3 days
Bedding, soap, and shampoo only when traveling to the wilderness
I like to travel as light as I can and most of my trips are for a week or less, so oftentimes the only thing I need for luggage is a single carryon bag